Family

Dryopteridaceae

Nomenclature

Teratophyllum aculeatum (Blume) Mett. ex Kuhn, Ann. Mus. Bot. Lugduno-Batavi 4: 296. 1869; Holttum, Rev. Fl. Malaya ed. 1, 2: 473, f. 276 a–h. 1955 [‘1954’]; Holttum, Fl. Males., Ser. II, Pterid. 1: 269, f. 3 & 4a–h. 1978; Tagawa & K.Iwats., SouthE. Asian Stud. 5: 92. 1967; Tagawa & K.Iwats., Fl. Thailand 3: 322, f. 27.1–6. 1988; Boonkerd & Pollawatn, Pterid. Thailand: 188. 2000. – Lomaria aculeata Blume, Enum. Pl. Javae 205. 1828. – Stenochlaena aculeata (Blume) Kunze, Bot. Zeit. 6: 142. 1848; C.Chr., Bot. Tidsskr. 32: 346. 1916.

Lomariopsis sorbifolia auct. non (L.) Fée: Bedd., Handb. Ferns Brit. India: 423, f. 254. 1883; Christ, Bot Tidsskr. 24: 107. 1901.

Description

Rhizome very slender, creeping or climbing. Sterile frond of two kinds; young frond or bathyphyll pinnate or bipinnate, with lower pinnae articulated; adult frond or acrophyll simply pinnate, all pinnae jointed to rachis. Bathyphylls leafy on lower portion of rachis, gradually more pinnate upwards, up to 8 by 2 cm, oblong with acute apex; pinnae up to 1.5 cm broad, entire or rarely forked. Sterile acrophyll up to 60 by 20 cm, oblong-lanceolate; pinnae about 15 pairs and a single terminal one, lanceolate, acuminate at apex, rounded to truncate at base, shortly stalked or sessile, up to 12 by 2.5 cm; papyraceous. Fertile frond pinnate; pinnae linear, more than 20 cm long, up to 2 mm broad, sporangia dispersed on lower surface of pinna except on midrib .

Distribution in Thailand

SOUTH-EASTERN: Chanthaburi, Trat; PENINSULAR: Ranong, Surat Thani, Phangnga, Nakhon Si Thammarat, Pattani, Yala, Narathiwat.

Distribution in Cambodia

Koh Kong.

Wider Distribution

Burma, Peninsular Malaysia, Sumatra to the Philippines and New Guinea.

Ecology

On mountain slopes in dense evergreen forests at low or medium altitudes.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread and not under any known threat.

Voucher specimens - Cambodia

Viboth R3-85, R3-86, R6-33, Koh Kong, Thma Baing (P).